Php对数据库外的数字进行排序？怎么实现

如何实现

数组排序方法

1. $numbers = [3, 6, 2, 8, 4];
   
2. sort($numbers);
   
3. print_r($numbers);

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自定义排序函数

1. $numbers = [3, 6, 2, 8, 4];
   
2. usort($numbers, function($a, $b) {
   
3.     return $a - $b;
   
4. });
   
5. print_r($numbers);

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逆序排序

1. $numbers = [3, 6, 2, 8, 4];
   
2. rsort($numbers);
   
3. print_r($numbers);

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多维数组排序

1. $data = [['number' => 3], ['number' => 6], ['number' => 2]];
   
2. usort($data, function($a, $b) {
   
3.     return $a['number'] - $b['number'];
   
4. });
   
5. print_r($data);

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保持索引关系

1. $numbers = [3 => 'three', 6 => 'six', 2 => 'two'];
   
2. asort($numbers);
   
3. print_r($numbers);

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自然排序

1. $numbers = ['img12.png', 'img10.png', 'img2.png', 'img1.png'];
   
2. natsort($numbers);
   
3. print_r($numbers);

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对象属性排序

1. class Number {
   
2.     public $value;
   
3.     public function __construct($value) {
   
4.         $this->value = $value;
   
5.     }
   
6. }
   
7. $objects = [new Number(3), new Number(6), new Number(2)];
   
8. usort($objects, function($a, $b) {
   
9.     return $a->value - $b->value;
   
10. });

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倒序自然排序

1. $numbers = ['img12.png', 'img10.png', 'img2.png', 'img1.png'];
   
2. natcasesort($numbers);
   
3. print_r(array_reverse($numbers));

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